If we can believe the long range forecast from the (soon to be muzzled, per Project 2025) National Weather Service, we’re going to see a massive, maybe record breaking, cold air outbreak event over Eastern North America.
At the same time, a northern ridge of the Jet will bring anomalously warm air into Canada and Alaska.
This has been explained many times, and the science, while not completely nailed, seems to only keep reinforcing, that climate change and a warming arctic are making for a more unstable jet stream, and making these events more likely, and more extreme.
Video below, from a few years ago, has probably the best collection of scientist interviews of any I’ve made – so useful if you know anyone that is confused.
If this is unsettling, don’t fret.
When Project 2025 makes NOAA go away, you won’t have to worry about silly stuff like massive weather anomalies anymore.
The Jet Streams are powerful because the Coriolis Effect formula form is:
Acceleration [east west] = f (velocity [north south}, latitude)
and is not
Velocity [east west] = f (velocity [north south}, latitude)
This is a geometrically-increasing (not linear) effect so a relatively-small change in velocity [north south causes a relatively-large change in velocity east west so a large increase in Jet Stream waviness for a smallish change in latitudinal temperature gradient.